/**
 * Common CSS styles for PDF Tools Platform
 */

:root {
    --primary: #2E7D32;
    --primary-light: #4CAF50;
    --primary-dark: #1B5E20;
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --medium-gray: #E0E0E0;
    --dark-gray: #757575;
    --black: #212121;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --error: #F44336;
    --warning: #FFC107;
    --success: #4CAF50;
    --info: #2196F3;
}

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

body {
    font-family: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--black);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    cursor: pointer;
}

.logo-text {
    margin-left: 0.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 1.5rem;
}

.nav-link {
    color: var(--black);
    font-weight: 500;
    padding: 0.5rem;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--black);
}

/* Tool Page Layout */
.tool-container {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-description {
    max-width: 800px;
    margin: 0 auto 2rem;
    text-align: center;
}

.tool-content {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--medium-gray);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

.file-input-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 2px dashed var(--medium-gray);
    border-radius: 10px;
    transition: var(--transition);
    cursor: pointer;
    margin-bottom: 1.5rem;
}

.file-input-container:hover {
    border-color: var(--primary);
    background-color: rgba(76, 175, 80, 0.05);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-input-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.file-input-text {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.file-input-subtext {
    font-size: 0.9rem;
    color: var(--dark-gray);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    box-shadow: var(--shadow);
    cursor: pointer;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn:disabled {
    background-color: var(--medium-gray);
    color: var(--dark-gray);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-secondary:hover {
    background-color: var(--light-gray);
    color: var(--primary-dark);
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Messages */
.message-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    max-width: 300px;
}

.message {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease forwards;
}

.message.info {
    background-color: var(--info);
    color: var(--white);
}

.message.success {
    background-color: var(--success);
    color: var(--white);
}

.message.warning {
    background-color: var(--warning);
    color: var(--black);
}

.message.error {
    background-color: var(--error);
    color: var(--white);
}

.message.fade-out {
    animation: fadeOut 0.5s ease forwards;
}

/* Loading Indicator */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1002;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--light-gray);
    border-top: 5px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* PDF Preview */
.pdf-preview {
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.pdf-thumbnail {
    max-width: 100%;
    border: 1px solid var(--medium-gray);
    border-radius: 5px;
    box-shadow: var(--shadow);
}

.pdf-info {
    margin-top: 1rem;
    text-align: center;
}

/* Footer */
footer {
    background-color: var(--primary-dark);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        padding: 1rem;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-item {
        margin: 1.5rem 0;
    }

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .tool-content {
        padding: 1.5rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}

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

:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}