/* Aether Morse Stylesheet - Cosmic Glassmorphism */

:root {
    --bg-dark: #06080e;
    --panel-bg: rgba(12, 17, 29, 0.65);
    --panel-bg-hover: rgba(16, 23, 38, 0.75);
    --card-bg: rgba(20, 27, 44, 0.45);
    --card-bg-focus: rgba(25, 34, 56, 0.6);
    --border-color: rgba(255, 255, 255, 0.05);
    --border-color-focus: rgba(0, 242, 254, 0.35);
    --text-primary: #f0f4fc;
    --text-secondary: #8b9ab4;
    --text-muted: #57657b;
    --cyan-neon: #00f2fe;
    --purple-neon: #7f00ff;
    --danger-color: #ff4757;
    --gradient-accent: linear-gradient(135deg, #00f2fe 0%, #3a7bd5 50%, #7f00ff 100%);
    --gradient-text: linear-gradient(135deg, #00f2fe 0%, #a18cd1 100%);
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-tele: 'Share Tech Mono', monospace;
}

/* RESET */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.15s ease;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    padding: 2rem 1.5rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* SPACE GLOW BACKGROUND DUST */
.space-glow {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
    filter: blur(140px);
    opacity: 0.28;
}

.glow-1 {
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, var(--cyan-neon) 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation: floatingGlow 18s infinite alternate ease-in-out;
}

.glow-2 {
    width: 55vw;
    height: 55vw;
    background: radial-gradient(circle, var(--purple-neon) 0%, transparent 70%);
    bottom: -15%;
    right: -10%;
    animation: floatingGlow 22s infinite alternate-reverse ease-in-out;
}

.glow-3 {
    width: 35vw;
    height: 35vw;
    background: radial-gradient(circle, #ff0844 0%, transparent 70%);
    top: 40%;
    left: 45%;
    opacity: 0.12;
    animation: floatingGlow 28s infinite alternate ease-in-out;
}

@keyframes floatingGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(6%, 8%) scale(1.15); }
}

/* CONTAINER */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

/* HEADER STYLE */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    background: var(--panel-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.app-logo {
    width: 54px;
    height: 54px;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.4));
}

.pulsing-core {
    animation: pulseCore 2.5s infinite ease-in-out;
}

@keyframes pulseCore {
    0%, 100% { fill: #fff; filter: drop-shadow(0 0 2px #fff); }
    50% { fill: var(--cyan-neon); filter: drop-shadow(0 0 6px var(--cyan-neon)); }
}

.title-meta h1 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.85rem;
    letter-spacing: 2px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title-meta .subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    font-weight: 400;
}

.status-panel {
    display: flex;
    gap: 1.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(0, 0, 0, 0.25);
    padding: 0.5rem 0.85rem;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.status-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    box-shadow: 0 0 6px var(--text-muted);
}

.status-pulse.green {
    background-color: #2ed573;
    box-shadow: 0 0 8px #2ed573;
    animation: pulseGreen 1.8s infinite;
}

.status-pulse.blue {
    background-color: var(--cyan-neon);
    box-shadow: 0 0 8px var(--cyan-neon);
    animation: pulseBlue 1.2s infinite;
}

@keyframes pulseGreen {
    0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(46, 213, 115, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(46, 213, 115, 0); }
    100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(46, 213, 115, 0); }
}

@keyframes pulseBlue {
    0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(0, 242, 254, 0); }
    100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}

.status-text {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: bold;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* MAIN GRID LAYOUT */
.main-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 1.75rem;
    min-width: 0; /* Prevents container stretching on mobile */
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* GENERIC PANEL STYLING */
.panel {
    background: var(--panel-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-width: 0; /* Ensures fluid container shrinking */
}

.panel:hover {
    background: var(--panel-bg-hover);
    border-color: rgba(255, 255, 255, 0.08);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding-bottom: 0.85rem;
}

.panel-header h2 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.panel-badge {
    font-size: 0.7rem;
    background: rgba(0, 242, 254, 0.1);
    color: var(--cyan-neon);
    border: 1px solid rgba(0, 242, 254, 0.2);
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-weight: 600;
}

/* TRANSLATION SECTION */
.translation-section {
    min-height: 520px;
}

.preset-controls select {
    background: rgba(10, 15, 28, 0.7);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.45rem 1.25rem 0.45rem 0.75rem;
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: all 0.3s ease;
}

.preset-controls select:hover, .preset-controls select:focus {
    border-color: var(--cyan-neon);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.translation-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex-grow: 1;
}

/* CARD STYLING */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    padding: 1.15rem;
    gap: 0.85rem;
    flex-grow: 1;
}

.card:focus-within {
    border-color: var(--border-color-focus);
    background: var(--card-bg-focus);
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.08);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding-bottom: 0.5rem;
}

.card-title {
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.char-count {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

textarea {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1.05rem;
    line-height: 1.6;
    resize: none;
    width: 100%;
    min-height: 120px;
    flex-grow: 1;
}

#plain-input {
    font-family: var(--font-sans);
}

#morse-input {
    font-family: var(--font-mono);
    letter-spacing: 2px;
    font-size: 1.15rem;
    color: var(--cyan-neon);
}

textarea::placeholder {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.55rem 1.15rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    outline: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-danger {
    background: rgba(255, 71, 87, 0.15);
    border: 1px solid rgba(255, 71, 87, 0.3);
    color: var(--danger-color);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(255, 71, 87, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 71, 87, 0.2);
}

.btn-danger:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-icon svg {
    display: block;
}

/* TRANSLATION BRIDGE */
.translation-bridge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    height: 24px;
    margin: 0.25rem 0;
}

.bridge-line {
    flex-grow: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
}

.bridge-indicator {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.bridge-indicator:hover {
    color: var(--cyan-neon);
    border-color: var(--cyan-neon);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
    transform: scale(1.05);
}

/* SIDEBAR GRID */
.sidebar-grid {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    min-width: 0; /* Prevents horizontal flex stretching on mobile */
}

/* SYNTH CONTROLS */
.synth-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.playback-controls {
    display: flex;
    gap: 0.75rem;
}

.playback-controls .btn {
    flex: 1;
    padding: 0.85rem;
    font-size: 0.95rem;
    border-radius: 12px;
}

.param-sliders {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    background: rgba(0, 0, 0, 0.15);
    padding: 1.25rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 500;
}

.slider-info label {
    color: var(--text-secondary);
}

.slider-value {
    color: var(--cyan-neon);
    font-family: var(--font-mono);
}

/* CUSTOM RANGE SLIDERS */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    outline: none;
    border: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--cyan-neon);
    cursor: pointer;
    box-shadow: 0 0 10px var(--cyan-neon);
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    box-shadow: 0 0 15px var(--cyan-neon), 0 0 30px var(--cyan-neon);
}

/* DYNAMIC BEACON */
.beacon-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 14px;
    padding: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.02);
    gap: 0.85rem;
}

.beacon-subtext {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 2px;
}

.beacon-wrapper {
    position: relative;
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.beacon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 3px solid rgba(255, 255, 255, 0.1);
    z-index: 2;
    transition: all 0.05s ease;
}

.beacon-glow {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: transparent;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.08s ease;
    z-index: 1;
    filter: blur(10px);
}

/* Active Beacon Tones */
.beacon.active {
    background: #ffffff;
    border-color: #ffffff;
    box-shadow: 0 0 25px 6px #ffffff, 0 0 45px 12px var(--cyan-neon);
    transform: scale(1.1);
}

.beacon-glow.active {
    background: radial-gradient(circle, rgba(0, 242, 254, 0.4) 0%, transparent 70%);
    opacity: 1;
    transform: scale(1.2);
}

/* TELEGRAPH STATION (KEYER) */
.toggle-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* SWITCH TOGGLE */
.switch {
    position: relative;
    display: inline-block;
    width: 38px;
    height: 20px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.08);
    transition: .3s;
    border-radius: 34px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 12px;
    width: 12px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-secondary);
    transition: .3s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: rgba(0, 242, 254, 0.2);
    border-color: var(--cyan-neon);
}

input:checked + .toggle-slider:before {
    transform: translateX(18px);
    background-color: var(--cyan-neon);
    box-shadow: 0 0 8px var(--cyan-neon);
}

.toggle-label {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.keyer-body {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
}

.keyer-hint {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.keyer-hint strong {
    color: var(--text-primary);
}

.keyer-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 0.65rem;
}

.metric {
    background: rgba(0, 0, 0, 0.2);
    padding: 0.65rem 0.85rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.02);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.metric-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value {
    font-size: 0.95rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

.code-font {
    color: var(--cyan-neon);
}

/* 3D GRAPHIC TELEGRAPH KEY BUTTON */
.telegraph-key-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

#telegraph-key {
    background: transparent;
    border: none;
    outline: none;
    position: relative;
    width: 140px;
    height: 120px;
    cursor: pointer;
}

/* 3D Keyer mechanics style elements */
.key-shadow {
    position: absolute;
    width: 120px;
    height: 100px;
    left: 10px;
    top: 15px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.5);
    filter: blur(8px);
    transition: transform 0.1s ease, filter 0.1s ease;
}

.key-base {
    position: absolute;
    width: 120px;
    height: 90px;
    left: 10px;
    top: 15px;
    border-radius: 10px;
    background: linear-gradient(135deg, #1d2538 0%, #0d121f 100%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 6px 0 #05080e, 0 10px 20px rgba(0,0,0,0.4);
}

.key-arm {
    position: absolute;
    width: 20px;
    height: 85px;
    left: 60px;
    top: 5px;
    background: linear-gradient(90deg, #c0c0c0, #e0e0e0, #a0a0a0);
    border-radius: 4px;
    transform: perspective(100px) rotateX(10deg);
    transform-origin: bottom center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: transform 0.06s ease;
}

.key-cap {
    position: absolute;
    width: 48px;
    height: 48px;
    left: 46px;
    top: -5px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #3d4966 0%, #151a26 100%);
    box-shadow: 0 6px 0 #080c14, 0 8px 15px rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.03);
    transition: transform 0.06s ease, box-shadow 0.06s ease;
}

/* Key depress active styles */
#telegraph-key.pressed .key-arm {
    transform: perspective(100px) rotateX(4deg) translateY(6px);
}

#telegraph-key.pressed .key-cap {
    transform: translateY(6px);
    box-shadow: 0 0px 0 #080c14, 0 2px 5px rgba(0,0,0,0.5), 0 0 15px rgba(0, 242, 254, 0.4);
    background: radial-gradient(circle at 35% 35%, #55668f 0%, #20273a 100%);
    border-color: rgba(0, 242, 254, 0.4);
}

#telegraph-key.pressed .key-shadow {
    transform: scale(0.95);
    filter: blur(4px);
}

/* DICTIONARY SECTION */
.dictionary-section {
    grid-column: 1 / -1;
}

.dictionary-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.dictionary-tabs {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding-bottom: 0.65rem;
}

.tab-btn {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 0.5rem 1.15rem;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--cyan-neon);
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.15);
}

.dictionary-grid {
    display: none;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.dictionary-grid.active {
    display: grid;
}

.dict-item {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.65rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.dict-char {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-primary);
}

.dict-morse {
    font-size: 0.9rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 1px;
}

/* Highlighting class when matching key gets hit or played back */
.dict-item.highlight {
    background: rgba(0, 242, 254, 0.12);
    border-color: var(--cyan-neon);
    box-shadow: 0 0 14px rgba(0, 242, 254, 0.25);
    transform: scale(1.05);
}

.dict-item.highlight .dict-char {
    color: #fff;
    text-shadow: 0 0 4px var(--cyan-neon);
}

.dict-item.highlight .dict-morse {
    color: var(--cyan-neon);
}

/* APP FOOTER */
.app-footer {
    text-align: center;
    padding: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    margin-top: 1rem;
}

/* ANIMATION SCROLLBARS */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   INTERACTIVE REINFORCEMENTS (OSCILLOSCOPE, WAVEFORM SELECT, TRAINING TUTOR)
   ========================================================================== */

/* Waveform Selector styles */
.waveform-selector {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.15);
    padding: 0.75rem 1rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.waveform-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.waveform-buttons {
    display: flex;
    gap: 0.4rem;
}

.waveform-btn {
    flex: 1;
    padding: 0.45rem 0.2rem;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    font-weight: bold;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
}

.waveform-btn:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

.waveform-btn.active {
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--cyan-neon);
    color: var(--cyan-neon);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

/* Spectrum Analysis & Beacon Overlay */
.spectrum-visualizer-row {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 1rem;
}

.oscilloscope-wrapper {
    flex-grow: 1;
    height: 72px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.03);
    overflow: hidden;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
}

#oscilloscope {
    display: block;
    width: 100%;
    height: 100%;
}

/* Telegraph Station Training Tutor styles */
.tutor-card {
    margin-top: 1rem;
    background: rgba(10, 15, 28, 0.35) !important;
    border-color: rgba(255, 255, 255, 0.03) !important;
    padding: 1rem !important;
    flex-grow: 0 !important;
}

.tutor-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding-bottom: 0.5rem;
}

.tutor-title {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1.5px;
}

.tutor-body {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    padding-top: 0.5rem;
}

.tutor-words-line {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.tutor-word-prompt {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.tutor-word-display {
    display: flex;
    gap: 0.35rem;
}

.tutor-letter {
    font-size: 1.4rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: rgba(255, 255, 255, 0.12);
    letter-spacing: 1px;
    transition: all 0.2s ease;
}

.tutor-letter.active {
    color: var(--cyan-neon);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
    transform: scale(1.1);
}

.tutor-letter.correct {
    color: #2ed573;
    text-shadow: 0 0 8px rgba(46, 213, 115, 0.4);
}

.tutor-letter.incorrect {
    color: var(--danger-color);
    text-shadow: 0 0 8px rgba(255, 71, 87, 0.4);
    animation: shakeLetter 0.3s ease;
}

@keyframes shakeLetter {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.tutor-guide-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    background: rgba(0, 0, 0, 0.15);
    padding: 0.45rem 0.75rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.01);
}

.tutor-guide-label {
    color: var(--text-muted);
    font-family: var(--font-sans);
}

.tutor-guide-code {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 1.5px;
}

.tutor-progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
}

.tutor-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-accent);
    border-radius: 10px;
    transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tutor-feedback-text {
    font-size: 0.75rem;
    font-style: italic;
    color: var(--text-secondary);
    text-align: center;
}

/* Compact button styling override */
.btn-sm {
    padding: 0.3rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 6px;
}



/* ==========================================================================
   MOBILE & RESPONSIVE QUERIES
   ========================================================================== */


/* ==========================================================================
   MOBILE & RESPONSIVE QUERIES
   ========================================================================== */

@media (max-width: 1024px) {
    .app-container {
        padding: 1rem;
    }

    .main-grid {
        grid-template-columns: 1fr;
    }

    .sidebar-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }

    .app-header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
        text-align: center;
    }

    .status-panel {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .panel {
        padding: 1.25rem;
    }

    .sidebar-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .keyer-metrics {
        grid-template-columns: 1fr 1fr;
    }

    .metric:nth-child(3) {
        grid-column: span 2;
    }

    .waveform-buttons {
        flex-wrap: wrap;
        gap: 0.4rem;
    }

    .waveform-btn {
        flex: 1 1 calc(50% - 0.2rem);
        padding: 0.5rem 0.25rem;
        font-size: 0.75rem;
    }

    .playback-controls {
        flex-direction: column;
        gap: 0.5rem;
    }

    .playback-controls .btn {
        width: 100%;
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    .card-footer {
        flex-wrap: wrap;
        justify-content: flex-start;
        gap: 0.4rem;
    }

    .card-footer .btn {
        flex: 1 1 calc(50% - 0.2rem);
        font-size: 0.75rem;
        padding: 0.45rem 0.65rem;
    }

    .visualizer-container {
        height: 120px;
    }

    .tutor-grid {
        grid-template-columns: 1fr;
    }

    .tutor-card {
        padding: 1rem;
    }

    .dictionary-tabs {
        flex-wrap: wrap;
        gap: 0.4rem;
    }

    .tab-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
        flex-grow: 1;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .title-meta h1 {
        font-size: 1.4rem;
    }

    .title-meta .subtitle {
        font-size: 0.75rem;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .preset-controls {
        width: 100%;
    }

    .preset-controls select {
        width: 100%;
    }

    .app-logo {
        width: 42px;
        height: 42px;
    }

    .telegraph-key {
        height: 140px;
    }

    .telegraph-button {
        width: 60px;
        height: 60px;
    }

    .keyer-metrics {
        grid-template-columns: 1fr;
    }

    .metric:nth-child(3) {
        grid-column: span 1;
    }

    .card-footer .btn {
        flex: 1 1 100%;
    }
}