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

body {
    overflow: hidden;
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #000;
    color: #fff;
}

#camera-container {
    position: relative;
    width: 100vw;
    height: 100vh; /* fallback */
    height: 100dvh; /* modern fix */
}

/* Canvas fills screen */
canvas {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

/* Fibonacci squares */
#fibonacci-squares {
    position: absolute;
    top: calc(16px + env(safe-area-inset-top));
    right: 16px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
}

#fibonacci-squares.active {
    background: rgba(0, 170, 255, 0.4);
    border-color: #0af;
}

/* 🔻 Bottom bar */
.bottom-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;

    display: flex;
    justify-content: center;
    align-items: center;

    padding: 20px;
    padding-bottom: calc(
        32px + env(safe-area-inset-bottom)
    ); /* iPhone safe area */

    z-index: 10;

    background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
}

/* Buttons (base) */
.bottom-bar button {
    width: 60px;
    height: 60px;

    border-radius: 50%;
    border: none;

    display: flex;
    align-items: center;
    justify-content: center;

    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);

    color: #0af;
    font-size: 22px;

    cursor: pointer;
}

img {
    width: 24px;
    height: 24px;
    fill: #0af;
}

/* Settings button (shows when overlays are enabled) */
#settings {
    transition:
        background-color 0.2s ease,
        opacity 0.2s ease;
}

/* 📸 Shutter (center emphasis) */
#shutter {
    width: 80px;
    height: 80px;

    border: 4px solid #0af;
    background: rgba(0, 170, 255, 0.3);
}

/* Fib control and list buttons */
#fib-controls-bar button,
#fib-list-bar button {
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
    border-radius: 6px;
    padding: 6px 12px;
}

/* Fib shutter */
#fib-shutter {
    position: fixed;
    bottom: calc(20px + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    display: none;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 4px solid #0af;
    background: rgba(0, 170, 255, 0.3);
    backdrop-filter: blur(10px);
    cursor: pointer;
    z-index: 10;
}

/* Press feedback */
#shutter:active,
#fib-shutter:active {
    transform: scale(0.92);
    background: #0af;
}

/* Flash effect */
#flash {
    position: absolute;
    inset: 0;
    background: #0af;
    opacity: 0;
    pointer-events: none;
    z-index: 20;
}

/* Overlay */
#photo-overlay {
    position: fixed;
    inset: 0;
    background: black;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;

    z-index: 999;
}

#photo-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Image preview */
#overlay-image {
    width: 80%;
    height: auto;

    border-radius: 12px;
    border: 1px solid #0af;
}

/* Overlay controls */
.overlay-controls {
    width: 100%;
    max-width: 500px;

    display: flex;
    justify-content: space-between;
    padding: 20px;
}

/* Buttons / links */
a,
button {
    color: #0af;
    background: none;
    border: none;
    cursor: pointer;
}

/* 🔝 Top bar */
.top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 20px;
    padding-top: calc(20px + env(safe-area-inset-top)); /* iPhone safe area */
    gap: 10px;

    z-index: 10;

    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent);
}

/* Gyroscope buttons */
.top-bar button {
    width: 50px;
    height: 50px;

    border-radius: 50%;
    border: none;

    display: flex;
    align-items: center;
    justify-content: center;

    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);

    color: #0af;
    font-size: 20px;

    cursor: pointer;
    transition: all 0.2s ease;
}

.top-bar button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.top-bar button:active {
    transform: scale(0.92);
}

#gyro-toggle.active {
    background: rgba(0, 170, 255, 0.4);
    border: 2px solid #0af;
}

#gyro-permission:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Fibonacci message */
#fib-message {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 16px;
    z-index: 1000;
    pointer-events: none;
    display: none;
    white-space: nowrap;
}

/* Fibonacci list bar */
#fib-list-bar {
    position: fixed;
    top: calc(16px + env(safe-area-inset-top));
    left: 16px;
    display: none;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

#fib-list-bar button {
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
    border-radius: 6px;
    padding: 6px 12px;
    color: #0af;
    cursor: pointer;
    border: none;
}

/* Fibonacci controls bar */
#fib-controls-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 20px;
    padding-top: calc(20px + env(safe-area-inset-top));
    gap: 10px;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent);
}

#fib-controls-bar button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: #0af;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

#fib-controls-bar button img {
    width: 20px;
    height: 20px;
}

#fib-controls-bar button:active {
    transform: scale(0.92);
}