@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700;800&family=Barlow:wght@400;500;600&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Barlow', sans-serif;
    background: #1a2e35;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    max-width: 500px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 25px;
}

h1 {
    font-family: 'Barlow Condensed', sans-serif;
    color: white;
    font-size: 2.2em;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.4);
}

h1 span {
    color: #e8572a;
}

.stats {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.stat {
    background: rgba(255,255,255,0.08);
    padding: 12px 25px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    color: #e8572a;
    font-size: 2em;
    font-weight: 700;
    font-family: 'Barlow Condensed', sans-serif;
}

.stat-label {
    color: rgba(255,255,255,0.6);
    font-size: 0.8em;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 3px;
}

/* Main card */
.challenge-card {
    background: #243b44;
    border-radius: 16px;
    padding: 30px 25px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    margin-bottom: 15px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.07);
}

.instruction {
    text-align: center;
    margin-bottom: 20px;
    width: 100%;
}

.instruction-text {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.9em;
    font-weight: 700;
    color: white;
    line-height: 1.2;
    letter-spacing: 1px;
}

/* Circular Timer */
.timer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 130px;
    height: 130px;
    margin: 10px auto;
}

.timer-svg {
    width: 130px;
    height: 130px;
    transform: rotate(-90deg);
}

.timer-bg {
    fill: none;
    stroke: rgba(255,255,255,0.1);
    stroke-width: 8;
}

.timer-progress {
    fill: none;
    stroke: #e8572a;
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.9s linear, stroke 0.3s ease;
}

.timer-number {
    position: absolute;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 2.5em;
    font-weight: 700;
    color: white;
}

.timer-label {
    font-size: 0.8em;
    color: rgba(255,255,255,0.5);
    margin-top: 8px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Feedback */
.feedback {
    text-align: center;
    padding: 15px 20px;
    border-radius: 10px;
    margin-top: 15px;
    font-size: 1.05em;
    font-weight: 600;
    width: 100%;
}

.feedback.hidden {
    display: none;
}

.perfect {
    background: rgba(72, 187, 120, 0.2);
    color: #68d391;
    border: 1px solid rgba(72,187,120,0.3);
}

.wrong {
    background: rgba(232, 87, 42, 0.2);
    color: #f0845a;
    border: 1px solid rgba(232,87,42,0.3);
}

/* Settings Row */
.settings-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.settings-label {
    color: rgba(255,255,255,0.5);
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.settings-value {
    color: white;
    font-weight: 700;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.2em;
    min-width: 35px;
    text-align: center;
}

.adj-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.3em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.adj-btn:hover {
    background: rgba(255,255,255,0.2);
}

/* Buttons */
.controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn {
    padding: 18px 30px;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.2em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.btn:active {
    transform: translateY(2px);
}

.btn-primary {
    background: #e8572a;
    color: white;
}

.btn-primary:hover {
    background: #d44820;
}

.btn-pause {
    background: #2d5a6b;
    color: white;
    border: 1px solid rgba(255,255,255,0.15);
}

.btn-pause:hover {
    background: #366d82;
}

.btn-continue {
    background: #48bb78;
    color: white;
}

.btn-continue:hover {
    background: #38a169;
}

.hidden {
    display: none !important;
}

.status {
    text-align: center;
    color: rgba(255,255,255,0.5);
    margin-top: 12px;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Tuner specific */
.tuner-card {
    background: #243b44;
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    margin-bottom: 15px;
    border: 1px solid rgba(255,255,255,0.07);
}

.tuner-title {
    text-align: center;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.2em;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.strings-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 25px;
}

.string-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border-radius: 10px;
    background: rgba(255,255,255,0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.string-indicator.active {
    background: rgba(232,87,42,0.15);
    border-color: #e8572a;
}

.string-indicator.in-tune {
    background: rgba(72,187,120,0.15);
    border-color: #48bb78;
}

.string-number {
    font-size: 0.7em;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.string-name {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.5em;
    font-weight: 700;
    color: white;
}

.string-status {
    font-size: 0.9em;
    margin-top: 4px;
}

.meter-section {
    margin-bottom: 20px;
}

.meter-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.75em;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    padding: 0 5px;
}

.meter-container {
    position: relative;
    height: 55px;
    background: rgba(255,255,255,0.05);
    border-radius: 30px;
    overflow: hidden;
    margin-bottom: 8px;
    border: 1px solid rgba(255,255,255,0.08);
}

.meter-zone-flat {
    position: absolute;
    left: 0;
    top: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(to right, rgba(232,87,42,0.6), rgba(232,87,42,0.1));
}

.meter-zone-sharp {
    position: absolute;
    right: 0;
    top: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(to left, rgba(232,87,42,0.6), rgba(232,87,42,0.1));
}

.meter-zone-intune {
    position: absolute;
    left: 37%;
    top: 0;
    width: 26%;
    height: 100%;
    background: rgba(72,187,120,0.5);
}

.center-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: rgba(255,255,255,0.2);
    z-index: 5;
}

.needle {
    position: absolute;
    top: 5px;
    bottom: 5px;
    width: 4px;
    background: white;
    border-radius: 2px;
    left: 50%;
    transform: translateX(-50%);
    transition: left 0.1s ease;
    z-index: 10;
    box-shadow: 0 0 8px rgba(255,255,255,0.5);
}

.needle::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid white;
}

.detected-note {
    text-align: center;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 2.8em;
    font-weight: 800;
    color: #e8572a;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.tuner-feedback {
    text-align: center;
    font-size: 0.95em;
    font-weight: 600;
    color: rgba(255,255,255,0.6);
    min-height: 24px;
    padding: 5px;
}

.tuner-feedback.in-tune { color: #68d391; }
.tuner-feedback.sharp { color: #f0845a; }
.tuner-feedback.flat { color: #f0845a; }

.btn-activate {
    background: #e8572a;
    color: white;
    width: 100%;
    margin-bottom: 10px;
}

.btn-activate:hover {
    background: #d44820;
}

.btn-start {
    background: #48bb78;
    color: white;
    display: none;
}

.btn-start:hover { background: #38a169; }

.btn-skip {
    background: transparent;
    color: rgba(255,255,255,0.5);
    border: 1px solid rgba(255,255,255,0.15);
    font-size: 1em;
    padding: 14px 30px;
}

.btn-skip:hover {
    background: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.8);
}

.tuner-status {
    text-align: center;
    color: #68d391;
    font-size: 0.9em;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

@media (max-width: 400px) {
    h1 { font-size: 1.7em; }
    .instruction-text { font-size: 1.5em; }
    .challenge-card { padding: 25px 15px; }
}