:root {
    /* Claude + Orange Brand Colors */
    --claude-beige-light: #faf8f5;
    --claude-beige-medium: #f4f1eb;
    --claude-beige-dark: #e8e0d4;
    --claude-beige-darker: #e6ddd1;
    --claude-beige-accent: #f0ebe3;
    --claude-beige-accent-hover: #ede6db;

    --claude-brick-light: #A0522D;
    --claude-brick-medium: #8B4513;
    --claude-brick-dark: #654321;

    /* Orange Brand Accents */
    --brand-orange: #d3a867;
    --brand-orange-light: #ff8c69;
    --brand-orange-dark: #e55a2b;
    --brand-orange-glow: rgba(232, 131, 95, 0.3);

    /* Glassmorphism */
    --glass-bg: rgba(250, 248, 245, 0.25);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: rgba(0, 0, 0, 0.1);

    /* Semantic Colors */
    --bg-primary: var(--claude-beige-light);
    --bg-secondary: var(--claude-beige-medium);
    --bg-gradient-start: var(--claude-beige-medium);
    --bg-gradient-end: var(--claude-beige-dark);

    --text-primary: var(--claude-brick-medium);
    --text-secondary: var(--claude-brick-light);
    --text-dark: var(--claude-brick-dark);
    --text-light: var(--claude-beige-light);

    --border-light: var(--claude-beige-darker);
    --border-accent: var(--brand-orange);

    --accent-primary: var(--claude-brick-medium);
    --accent-secondary: var(--brand-orange);
    --accent-bg: var(--claude-beige-accent);
    --accent-bg-hover: var(--claude-beige-accent-hover);

    /* Shadows */
    --shadow-light: rgba(139, 69, 19, 0.08);
    --shadow-medium: rgba(139, 69, 19, 0.15);
    --shadow-focus: var(--brand-orange-glow);
    --shadow-glass: 0 3px 20px rgba(0, 0, 0, 0.1);
}

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

body {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    font-family: "Gothic A1", sans-serif;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 20px 60px var(--shadow-medium);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.header {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: var(--text-light);
    text-align: center;
    padding: 40px 20px;
    margin: 0 auto;
}

.header h1 {
    font-family: "Noto Sans", "Gothic A1", sans-serif;
    font-size: 48px;
    font-weight: 100;
    letter-spacing: 0.2px;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.7;
}

.logo {
    background-image: url('/Img/gb_stamp_logo.png');
    width: 104px;
    height: 104px;
    background-repeat: no-repeat;
    background-size: cover;
    margin: 0 auto 20px;
}


.input-section {
    background: var(--glass-bg);
    /* backdrop-filter: blur(5px); */
    /* -webkit-backdrop-filter: blur(5px); */
    border: 1px solid var(--glass-border);
    padding: 30px;
    margin-bottom: 60px;
    box-shadow: var(--shadow-glass);
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
}

.text-input {
    width: 100%;
    padding: 18px 24px;
    border: 2px solid var(--border-light);
    border-radius: 16px;
    font-size: 16px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.text-input:focus {
    outline: none;
    border-color: var(--brand-orange);
    box-shadow: 0 0 0 4px var(--shadow-focus), 0 8px 25px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.size-controls {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.size-controls span {
    color: var(--text-primary);
    font-weight: 600;
    margin-right: 10px;
    font-size: 1rem;
}

.size-slider-container {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.5);
    padding: 12px 20px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
}

.size-slider {
    width: 400px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-light);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--brand-orange-dark);
    cursor: pointer;
    box-shadow: 0 2px 8px var(--brand-orange-glow);
    transition: all 0.2s ease;
}

.size-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px var(--brand-orange-glow);
}

.size-display {
    min-width: 60px;
    text-align: center;
    font-weight: 700;
    color: var(--brand-orange);
    font-size: 1.1rem;
}

.font-list {
    padding: 30px;
}

.font-section {
    margin-bottom: 40px;
}

.section-title {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-light);
    text-align: center;
}

.font-item {
    display: flex;
    align-items: center;
    padding: 20px;
    margin-bottom: 15px;
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px var(--shadow-light);
}

.font-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--border-accent);
}

.font-label {
    min-width: 80px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.font-preview {
    flex: 1;
    padding: 15px 20px;
    /* background: var(--accent-bg); */
    /* border-radius: 8px; */
    /* margin-left: 15px; */
    min-height: 60px;
    /* display: flex; */
    /* align-items: center; */
    /* border: 1px solid var(--border-light); */
    transition: all 0.3s ease;
    color: var(--text-dark);
    line-height: 1.4;
}

.font-preview:hover {
    background: var(--accent-bg-hover);
    border-color: var(--border-accent);
}

/* Footer */
.footer {
    margin-top: 50px;
    padding: 40px 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    /* border-radius: 20px; */
    text-align: center;
    box-shadow: var(--shadow-glass);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.copyright {
    color: var(--text-primary);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ******* responsible design ******* */

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        max-width: 100%;
    }

    .header {
        padding: 30px 20px;
    }

    .input-section {
        padding: 20px;
    }

    .font-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .font-label {
        min-width: auto;
    }

    .size-slider-container {
        flex-direction: column;
        gap: 10px;
    }

    .size-slider {
        width: 150px;
    }

    .social-links {
        gap: 15px;
    }
}

/* ******* media ******* */

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .logo {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}