/* Catppuccin Mocha Colors */
:root {
    --base: #1e1e2e;
    --surface0: #1a1826;
    --surface1: #1e1e2e;
    --surface2: #26233a;
    --surface3: #313244;
    --surface4: #3c3846;
    --overlay0: #45475a;
    --overlay1: #585b70;
    --overlay2: #6c7086;
    --overlay3: #7f849c;
    --overlay4: #9399b2;
    --text: #cdd6f4;
    --subtext0: #bac2de;
    --subtext1: #a6adc8;
    --subtext2: #9399b2;
    --love: #eba0ac;
    --flamingo: #f38ba8;
    --pink: #f5c2e7;
    --mauve: #cba6f7;
    --red: #f38ba8;
    --maroon: #eba0ac;
    --peach: #fab387;
    --yellow: #f9e2af;
    --green: #a6e3a1;
    --teal: #94e2d5;
    --sky: #89dceb;
    --sapphire: #74c7ec;
    --blue: #89b4fa;
    --lavender: #b4befe;
}

/* Catppuccin Latte Colors */
:root {
    --base-latte: #ffffff;
    --surface0-latte: #f2f3f5;
    --surface1-latte: #e0e0e0;
    --surface2-latte: #d0d0d0;
    --surface3-latte: #c0c0c0;
    --surface4-latte: #b0b0b0;
    --overlay0-latte: #a0a0a0;
    --overlay1-latte: #909090;
    --overlay2-latte: #808080;
    --overlay3-latte: #707070;
    --overlay4-latte: #606060;
    --text-latte: #11111b;
    --subtext0-latte: #22222b;
    --subtext1-latte: #33333b;
    --subtext2-latte: #44444b;
    --love-latte: #ef476f;
    --flamingo-latte: #ff6b6b;
    --pink-latte: #ff91a4;
    --mauve-latte: #a069f0;
    --red-latte: #ff6b6b;
    --maroon-latte: #ef476f;
    --peach-latte: #ffa57f;
    --yellow-latte: #ffd166;
    --green-latte: #06d6a0;
    --teal-latte: #118ab2;
    --sky-latte: #073b4c;
    --sapphire-latte: #089eac;
    --blue-latte: #3a86ff;
    --lavender-latte: #8338ec;
}

/* Dark theme colors */
[data-theme="dark"] {
    --base: #1e1e2e;
    --surface0: #1a1826;
    --surface1: #1e1e2e;
    --surface2: #26233a;
    --surface3: #313244;
    --surface4: #3c3846;
    --overlay0: #45475a;
    --overlay1: #585b70;
    --overlay2: #6c7086;
    --overlay3: #7f849c;
    --overlay4: #9399b2;
    --text: #cdd6f4;
    --subtext0: #bac2de;
    --subtext1: #a6adc8;
    --subtext2: #9399b2;
    --love: #eba0ac;
    --flamingo: #f38ba8;
    --pink: #f5c2e7;
    --mauve: #cba6f7;
    --red: #f38ba8;
    --maroon: #eba0ac;
    --peach: #fab387;
    --yellow: #f9e2af;
    --green: #a6e3a1;
    --teal: #94e2d5;
    --sky: #89dceb;
    --sapphire: #74c7ec;
    --blue: #89b4fa;
    --lavender: #b4befe;
}

/* Light theme colors */
[data-theme="light"] {
    --base: #ffffff;
    --surface0: #f2f3f5;
    --surface1: #e0e0e0;
    --surface2: #d0d0d0;
    --surface3: #c0c0c0;
    --surface4: #b0b0b0;
    --overlay0: #a0a0a0;
    --overlay1: #909090;
    --overlay2: #808080;
    --overlay3: #707070;
    --overlay4: #606060;
    --text: #11111b;
    --subtext0: #22222b;
    --subtext1: #33333b;
    --subtext2: #44444b;
    --love: #ef476f;
    --flamingo: #ff6b6b;
    --pink: #ff91a4;
    --mauve: #a069f0;
    --red: #ff6b6b;
    --maroon: #ef476f;
    --peach: #ffa57f;
    --yellow: #ffd166;
    --green: #06d6a0;
    --teal: #118ab2;
    --sky: #073b4c;
    --sapphire: #089eac;
    --blue: #3a86ff;
    --lavender: #8338ec;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
}

body {
    background-color: var(--base);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    transition: background-color 0.3s ease;
    position: relative;
}

/* Add subtle background pattern */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(var(--overlay0) 1px, transparent 1px),
        radial-gradient(var(--overlay0) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
    opacity: 0.05;
    z-index: -1;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--surface2);
    color: var(--text);
    border: none;
    padding: 0.8rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--mauve);
    transform: scale(1.1) rotate(15deg);
}

.container {
    background: linear-gradient(145deg, var(--surface0), var(--surface1));
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease-out forwards;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--surface3);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    text-align: center;
    color: var(--mauve);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out 0.2s forwards;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.input-section {
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out 0.4s forwards;
}

input {
    width: 100%;
    padding: 1.2rem;
    border: 2px solid var(--overlay1);
    border-radius: 12px;
    margin-bottom: 1.2rem;
    font-size: 1rem;
    background-color: var(--surface1);
    color: var(--text);
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

input:focus {
    outline: none;
    border-color: var(--mauve);
    box-shadow: 0 0 0 3px rgba(203, 166, 247, 0.3), inset 0 2px 4px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

input::placeholder {
    color: var(--overlay2);
}

button {
    background: linear-gradient(135deg, var(--mauve), var(--lavender));
    color: var(--base);
    border: none;
    padding: 1.2rem 2rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(203, 166, 247, 0.3);
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.6s ease;
}

button:hover {
    background: linear-gradient(135deg, var(--lavender), var(--mauve));
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(203, 166, 247, 0.4);
}

button:hover::before {
    left: 100%;
}

button:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(203, 166, 247, 0.3);
}

#generateBtn {
    width: 100%;
}

.qr-section {
    text-align: center;
    opacity: 0;
    transform: scale(0.9);
    animation: fadeInScale 0.6s ease-out 0.6s forwards;
    margin-top: 1rem;
    min-height: 100px;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

#qrCode {
    margin: 1.5rem auto;
    transition: all 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
    background-color: white;
    padding: 1rem;
    border-radius: 12px;
    display: inline-block;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
    /* Hide the QR code container initially */
    display: none;
    opacity: 0;
    transform: scale(0.9);
}

#qrCode.visible {
    opacity: 1;
    transform: scale(1);
}

#qrCode::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to bottom right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(45deg);
    animation: shine 3s infinite;
    pointer-events: none;
    z-index: 1;
}

@keyframes shine {
    0% {
        top: -50%;
        left: -50%;
    }
    100% {
        top: 150%;
        left: 150%;
    }
}

#qrCode img {
    transition: transform 0.3s ease;
    border-radius: 8px;
    position: relative;
    z-index: 2;
}

#qrCode:hover img {
    transform: scale(1.05);
}

#downloadBtn {
    background: linear-gradient(135deg, var(--green), var(--teal));
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#downloadBtn::after {
    content: '↓';
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

#downloadBtn:hover::after {
    transform: translateY(3px);
}

#downloadBtn:hover {
    background: linear-gradient(135deg, var(--teal), var(--green));
}

.hidden {
    display: none;
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
        margin: 1rem;
        border-radius: 12px;
    }
    
    button {
        width: 100%;
        padding: 1rem 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Theme transition */
.theme-transition {
    transition: background-color 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

.theme-transition * {
    transition: background-color 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

/* Icon animation */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.icon-spin {
    animation: spin 0.5s ease-out;
}

/* Error animation */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

input.error {
    animation: shake 0.5s ease-in-out;
    border-color: var(--red) !important;
    background-color: rgba(243, 139, 168, 0.1) !important;
}

/* Button disabled state */
button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: translateY(0) !important;
    box-shadow: 0 2px 8px rgba(203, 166, 247, 0.2) !important;
}